The veteran reality series hosted by Jeff Probst returns for its 21st installment. This time around, the 20 castaways are divided into tribes based on their ages. One tribe consists of castaways over the age of 40, who will try to use their life experiences to outlast the 30-and-under tribe they will be facing. Among the castaways competing on the 40-plus tribe is former NFL coach Jimmy Johnson, who led the Dallas Cowboys to consecutive Super Bowl titles in 1992 and 1993.